RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star GA1060:01626619 with event index number of 2353639

Geocentric closest approach at 2028/10/21 08:56:27 UTC

J2000 position of star is 06:07:56.8 +17:55:40
Equinox of date position of star is 06:09:17.9 +17:55:22
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 14% illuminated.
Apparent brightness V=23.6

[RECON map]
Object is 41.9 AU from the Sun and 41.5 AU from the Earth.
Apparent velocity is 9.4 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 1910 seconds.
The 1-sigma cross-track error in the shadow position is 1900 km.
The sky-plane scale is 30088.7 km/arcsec.

The object has an absolute magnitude Hv=7.3
Diameter=229.1 km assuming a 5% albedo -- 22.7 sec chord
Diameter=93.5 km assuming a 30% albedo -- 9.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 182222, (2028/10/21 08:56UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:43.9 +07:24:36  0.4 10.97 155
Alhena         06:39:22.5 +16:22:20  1.9  7.27 152
PPM 122116     06:15:14.9 +18:40:12  6.3  1.53 158
PPM 121992     06:11:08.0 +17:49:39  8.4  0.37 159
PPM 121945     06:09:32.7 +17:38:28 10.2  0.28 159
182222         06:09:37.8 +17:55:17 13.9       159
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 0.5 sigma about the mid-time.
The median site spacing is 25.6 km RECON observability=1.0 and success probability=22.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:59:39 -47.5 Dark Down 40.4 113.7 Up 08:44:39 - 09:14:39 113
Victoria 09:00:11 -50.3 Dark Down 39.5 109.2 Up 08:45:11 - 09:15:11 60
Peachland 08:59:44 -48.1 Dark Down 41.2 113.6 Up 08:44:44 - 09:14:44 36
Kelowna 08:59:41 -47.9 Dark Down 41.3 114.0 Up 08:44:41 - 09:14:41 34
Summerland 08:59:45 -48.2 Dark Down 41.3 113.6 Up 08:44:45 - 09:14:45 23
Penticton 08:59:45 -48.2 Dark Down 41.4 113.6 Up 08:44:45 - 09:14:45 15
Oliver 08:59:48 -48.5 Dark Down 41.5 113.3 Up 08:44:48 - 09:14:48 -8
Anarchist Mountain Observatory 08:59:49 -48.6 Dark Down 41.7 113.4 Up 08:44:49 - 09:14:49 -25
Okanogan 08:59:55 -49.3 Dark Down 41.8 112.7 Up 08:44:55 - 09:14:55 -63
Brewster 08:59:58 -49.6 Dark Down 41.8 112.3 Up 08:44:58 - 09:14:58 -76
Manson/Chelan 09:00:02 -49.9 Dark Down 41.7 111.7 Up 08:45:02 - 09:15:02 -79
Wenatchee 09:00:07 -50.3 Dark Down 41.8 111.2 Up 08:45:07 - 09:15:07 -107
Ellensburg 09:00:11 -50.7 Dark Down 41.8 110.7 Up 08:45:11 - 09:15:11 -129
Yakima 09:00:14 -51.1 Dark Down 41.9 110.3 Up 08:45:14 - 09:15:14 -157
Toppenish/White Swan 09:00:15 -51.2 Dark Down 42.1 110.3 Up 08:45:15 - 09:15:15 -178
Sleaford 08:58:16 -41.2 Dark Down 47.1 130.3 Up 08:43:16 - 09:13:16 -187
The Dalles 09:00:26 -52.2 Dark Down 41.9 109.0 Up 08:45:26 - 09:15:26 -209
Maupin 09:00:29 -52.5 Dark Down 42.1 108.7 Up 08:45:29 - 09:15:29 -242
PNWRO 09:00:12 -51.0 Dark Down 43.2 111.4 Up 08:45:12 - 09:15:12 -250
Sisters 09:00:39 -53.4 Dark Down 42.1 107.5 Up 08:45:39 - 09:15:39 -290
Bend 09:00:39 -53.5 Dark Down 42.3 107.6 Up 08:45:39 - 09:15:39 -315
Oregon Observatory 09:00:42 -53.7 Dark Down 42.3 107.3 Up 08:45:42 - 09:15:42 -324
Chiloquin 09:00:55 -55.0 Dark Down 42.4 105.8 Up 08:45:55 - 09:15:55 -408
Klamath Falls 09:00:58 -55.2 Dark Down 42.6 105.6 Up 08:45:58 - 09:15:58 -436
Fall River/Burney 09:01:04 -56.1 Dark Down 43.2 104.9 Up 08:46:04 - 09:16:04 -539
Cedarville 09:00:54 -55.2 Dark Down 43.9 106.4 Up 08:45:54 - 09:15:54 -542
Greenville 09:01:10 -56.7 Dark Down 43.8 104.5 Up 08:46:10 - 09:16:10 -624
Gimple 09:01:09 -56.6 Dark Down 43.8 104.5 Up 08:46:09 - 09:16:09 -627
Quincy 09:01:12 -56.8 Dark Down 43.8 104.3 Up 08:46:12 - 09:16:12 -640
Portola 09:01:09 -56.7 Dark Down 44.2 104.6 Up 08:46:09 - 09:16:09 -666
Reno 09:01:08 -56.6 Dark Down 44.7 104.8 Up 08:46:08 - 09:16:08 -709
Carson City 09:01:11 -56.9 Dark Down 44.9 104.5 Up 08:46:11 - 09:16:11 -739
Gardnerville 09:01:13 -57.1 Dark Down 45.0 104.3 Up 08:46:13 - 09:16:13 -760
Yerington 09:01:09 -56.8 Dark Down 45.4 104.9 Up 08:46:09 - 09:16:09 -776
Hawthorne 09:01:09 -56.9 Dark Down 45.9 104.8 Up 08:46:09 - 09:16:09 -832
Lee Vining 09:01:18 -57.6 Dark Down 45.7 103.9 Up 08:46:18 - 09:16:18 -860
Bishop 09:01:17 -57.6 Dark Down 46.4 103.9 Up 08:46:17 - 09:16:17 -935
Beatty 09:01:11 -57.1 Dark Down 47.8 104.7 Up 08:46:11 - 09:16:11 -1031
Dunrhomin 08:59:33 -48.3 Dark Down 54.6 119.7 Up 08:44:33 - 09:14:33 -1142
Nikitin 08:59:35 -48.4 Dark Down 54.7 119.4 Up 08:44:35 - 09:14:35 -1157
CU-SBO 08:59:36 -48.5 Dark Down 54.7 119.3 Up 08:44:36 - 09:14:36 -1160
Wildwood 09:01:41 -60.1 Dark Down 47.0 100.4 Up 08:46:41 - 09:16:41 -1203
Laughlin/Bullhead City 09:01:09 -57.1 Dark Down 49.9 104.6 Up 08:46:09 - 09:16:09 -1257
Patrick 09:01:04 -56.5 Dark Down 50.4 105.5 Up 08:46:04 - 09:16:04 -1261
Idyllwild 09:01:33 -59.3 Dark Down 48.6 101.4 Up 08:46:33 - 09:16:33 -1303
Lake Havasu City 09:01:12 -57.3 Dark Down 50.3 104.0 Up 08:46:12 - 09:16:12 -1325
Calipatria 09:01:30 -58.9 Dark Down 49.7 101.6 Up 08:46:30 - 09:16:30 -1401
Yuma 09:01:28 -58.6 Dark Down 50.5 101.7 Up 08:46:28 - 09:16:28 -1472
George/Scottsdale 09:01:02 -56.2 Dark Down 52.4 105.1 Up 08:46:02 - 09:16:02 -1482

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 182222, (2028/10/21 08:56UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.97 155
Alhena         06:37:42.8 +16:23:56  1.9  7.27 152
PPM 122116     06:13:33.3 +18:40:48  6.3  1.53 158
PPM 121992     06:09:27.0 +17:50:05  8.4  0.37 159
PPM 121945     06:07:51.8 +17:38:50 10.2  0.28 159
182222         06:07:56.8 +17:55:40 13.9       159
Positions are for J2000

Event circumstances last updated at 2023/02/12 03:53:59 UT

Marc W. Buie, Southwest Research Institute

RECON